Sequential Infiltration Synthesis of Cadmium Sulfide Discrete Atom Clusters

Abstract

This study introduces a sequential infiltration synthesis (SIS) method to form cadmium sulfide discrete atom clusters within poly(4-vinylpyridine) polymer thin films. By alternating exposures to dimethyl cadmium and hydrogen sulfide, researchers synthesized cubane-type Cd₄S₄ core clusters. The clusters, capped with methyl, thiol, and hydroxy groups, were structurally validated through spectroscopy, X-ray scattering, and simulations. This SIS technique offers a new pathway for creating precisely structured materials with potential applications in light-absorbing technologies, including solar energy harvesting.